Unfortunately, the only info I have is trivia from the books. The director, Mike Vejar brough ta tape of the song in and they shot the scene with that song playing in the background. That's why the scene is so intense. It's one of my favorite episodes for that scene and the one of Garibaldi 'waking up' from Bester's programming.
There is no mention of who did the song, or any other credits. There are a lot of sources out there, I'm sure one of them has the song info.